Two-stroke engine course: theory and maintenance
Online course of 300 hours in two-stroke engines: theory and maintenance. 6 modules covering the two-stroke cycle, engine components, expansion chamber exhausts, lubrication and carburation, and maintenance and rebuilding, with ISO 13738, JASO M345 and MOTA 2-Stroke Simulation, with an assigned technical tutor.
Take the controls.
Run a real engineering trade-off from this field. Move the sliders, watch the model react in real time and beat the challenge.
What you will be able to do
Explain the two-stroke cycle and port scavenging.
Identify the components and their tolerances.
Calculate the basic tuning of an expansion chamber exhaust.
Select the right oil and mixing ratio.
Carburate a two-stroke engine to suit the conditions.
Carry out engine maintenance and rebuilds.
Draw up a maintenance plan for a two-stroke engine.
Who it's for
- Two-stroke motorcycle mechanics looking to deepen their knowledge of engine theory and maintenance.
- Motocross engine tuners.
- Enduro technicians.
- Classic motorcycle restorers.
- Karting mechanics.
- Racing workshop technicians.
- Engineering or science graduates seeking to enter the motorcycle workshop sector.
What you'll work with
- ISO 13738 (classification of two-stroke engine oils)
- JASO M345 (two-stroke engine oils)
- Commission Delegated Regulation (EU) No 134/2014 (environmental requirements)
- UNECE Regulation No 41 (motorcycle noise)
- UNE-EN 228 (automotive petrol)
- FIM Motocross Technical Rules (competition technical regulations)
- Royal Decree 892/2013 (Spanish Historic Vehicles Regulation)
- MOTA 2-Stroke Simulation
- EngMod2T
- TSR Port Mapping
- Microsoft Excel
6 modules
1.1Phases of the cycle in one crankshaft revolution1.2Port scavenging1.3Piston-port, reed-valve and rotary-valve induction1.4Crankcase pre-compression1.5Port timing diagram1.6Fresh-charge losses1.7Specific power compared with the four-stroke1.8Emissions and fuel consumption1.9Current applications: enduro, motocross and karting1.10Practical: reading a port timing diagram
2.1Cylinder and nickel-silicon carbide coating2.2Piston, ring and gudgeon pin2.3Connecting rod and needle bearing2.4Crankshaft and crankcase seals2.5Reed block2.6Variable-geometry exhaust valve2.7Cylinder head and combustion chamber2.8Ignition and spark plug2.9Air and liquid cooling2.10Workshop: measuring piston-to-cylinder clearance
3.1Pressure waves in the exhaust3.2Parts: divergent cone, belly and convergent cone3.3Length and tuned engine speed3.4Effect on the power curve3.5Silencer and noise3.6Basic design of an exhaust3.7Damage and dents3.8Noise regulations3.9Racing exhausts3.10Lab: calculating tuned length
4.1Oil and petrol premix4.2Separate pump lubrication4.3Mineral and synthetic oils4.4Two-stroke oil classifications4.5Mixing ratios4.6Two-stroke-specific carburation4.7Reading the spark plug and exhaust4.8Seizure: causes and prevention4.9Direct injection in modern two-strokes4.10Practical: carburation for different altitudes
5.1Hour-based maintenance plan5.2Piston and ring replacement5.3Cylinder and port inspection5.4Reed replacement5.5Crankshaft seal replacement5.6Crankcase leak-down test5.7Reboring and recoating5.8Running-in after a rebuild5.9Diagnosing power loss5.10Case study: rebuilding a motocross engine
6.1Choosing the motorcycle6.2Technical description of the engine6.3Initial engine diagnosis6.4Rebuild plan6.5Carburation tuning6.6Testing and running-in6.7Maintenance plan6.8Rebuild budget6.9Report and presentation6.10Final project: final review with the tutor
How you'll learn
100% online training on the SEIUM campus, with downloadable material, recorded classes and an assigned technical tutor. No fixed timetables: you progress at your own pace within each intake, so you can combine it with your job.
Each module combines theory, guided reading of the original standard and applied exercises. The working software is MOTA 2-Stroke Simulation, EngMod2T, TSR Port Mapping and Microsoft Excel, in free, academic or evaluation versions. Tests are studied on real procedures: rebuilding a motocross engine, calculating an expansion chamber exhaust and carburation for different altitudes. Assessment is continuous by module plus the final project.
Standards covered: ISO 13738, JASO M345, Commission Delegated Regulation (EU) No 134/2014, UNECE Regulation No 41, UNE-EN 228, FIM Motocross Technical Rules, Royal Decree 892/2013.
Build it end to end
Your final project follows the real engineering workflow, step by step, reviewed by your tutor.
Where this takes you
Requirements
- No prior qualification is required.
- An internet connection and a computer capable of running the programme software.
- English sufficient to read technical standards.
Ready to start?
Send your application today. Our admissions team replies within 72 hours with your study plan and funding options.
Frequently asked questions
The programme totals 300 hours over 3 months. You set your own pace within each intake, and your tutor helps you plan the workload around your job.
You work with MOTA 2-Stroke Simulation, EngMod2T, TSR Port Mapping and Microsoft Excel, using free, academic or evaluation versions. Your tutor indicates the free alternative wherever one exists.
A SEIUM Institute certificate, awarded on passing the continuous assessment and the final project. It is SEIUM's own qualification, not an official state degree; its recognition depends on the programme completed and the regulations of each country.
Yes. Modules passed are recognised in a higher programme in the same area (postgraduate diploma or master's). Ask about the recognition policy when you enrol.
No prior qualification is required; you need an internet connection, a computer that can run the programme software and English sufficient to read technical standards.
Start dates are set by SEIUM's faculty for each intake. Our admissions team will confirm the next available date when you apply.
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